This book discusses and studies the basic course of ecological civilization construction in the 70 years since the founding of the People’s Republic of China and summarizes the experience and lessons. It contains 75 articles from 75 top experts and government officials in the field of ecological civilization policy-making and basic theory research in China, including Xi Jinping Thought on Ecological Civilization, ecological culture, green industry economy, environmental quality, legal system, ecological security and so on, so as to provide reference for understanding and studying the progress of ecological environment protection since the founding of China.